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August 14, 2017, 22:51 |
aircore in hydrocyclone
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#1 |
New Member
Join Date: May 2017
Posts: 14
Rep Power: 8 |
Hi there
I simulate flow within a hydrocyclone and I stuck in a bad problem. When I simulate my case in cfx, unfortunately the aircore has no continuious form(please see pics capture and capture1) and I've examined my simulation with some of turbulent models like e-base and w-base models. I think I have a problem in BC. Inlet: bulk mass flow rate, volume fraction of air=0, volume fraction of water=1 Vortex Finder(Overflow): Opening(because water exit and air enter within the hydrocyclone), Mass and Momentum= Opening pres. and Din, Volume fraction of air=zero gradient(because I have no idea what percentage of volume fraction enter to body), Volume fraction of water= zero gradient( like air I don't have any idea what percentage of volume fraction of overflow outlet exit from body) Apex(underflow): Opening(because water exit and air enter within the hydrocyclone), Mass and Momentum= Opening pres. and Din, Volume fraction of air=zero gradient(because I have no idea what percentage of volume fraction enter to body), Volume fraction of water= zero gradient( like air I don't have any idea what percentage of volume fraction of underflow outlet exit from body) Other problem I stuck in it is after running about 600 iteration I have air just near outlets and I don't have continous air core within body(see picture capture 2 and capture 3). I really don't know what do I do. Please help me ASAP. Thank you in advance |
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